The AERONET (AErosol RObotic NETwork) program is a federation of ground-based remote sensing aerosol networks established by NASA and PHOTONS (PHOtométrie pour le Traitement Opérationnel de Normalisation Satellitaire; Univ. of Lille 1, CNES, and CNRS-INSU) and is greatly expanded by networks (e.g., RIMA, AeroSpan, AEROCAN, and CARSNET) and collaborators from national agencies, institutes, universities, individual scientists, and partners. The program provides a long-term, continuous and readily accessible public domain database of aerosol optical, microphysical and radiative properties for aerosol research and characterization, validation of satellite retrievals, and synergism with other databases. The network imposes standardization of instruments, calibration, processing and distribution.
Explanation "How to download data from the AERONET database": http://www.instesre.org/Aerosols/aeronet_files/aeronet.htm
Several off-line analysis tools have been developed by AERONET/PHOTONS to analyze AERONET data with satellite data. These tools can be accessed at the LOA software development page: http://www-loa.univ-lille1.fr/informatique/index.php?lang=us